Well, you have to use double Angle formulas.
这里需要用到二倍角公式。
Well, using, again, the double Angle formula.
再次利用二倍角公式。
I mean, here you just use a double Angle again and then you can get it.
这里再次用二倍角公式。
PC_401 computer system was introduced to the double crystal goniometer for small Angle scattering measurement.
对双晶衍射仪实行改造，用一台PC _ 401微机直接控制和进行小角散射等测量。
They have big cheekbones, big mandible angle without double fold, and a low profile nose.
他们希望拥有西方人一样挺拔的鼻子，小巧精致的颧骨和下颌。
Double diaphragm surface smooth, ribbed diaphragm sharp Angle.
双膈面光滑，肋膈角锐利。
Double diaphragm surface smooth, ribbed diaphragm sharp Angle.
双膈面光滑，肋膈角锐利。
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